# 变量
n1 = 10
n2 = -10
n3 = 1000.00
n4 = 500.00
n5 = False
n6 = True

n7 = "HELLO"

print("n1:", n1)
print("n2:", n2)
print("n3:", n3)
print("n4:", n4)
print("n5:", n6)
print("n7:", n3 - n4)

money = 100
price = 10

print("总金额:", money, "价格：", price, "剩余：", money - price)


